Roll Flutter Engine from 349c0647b4be to e6cc7ddaaf0f (4 revisions) (#112420)

diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 80cdeec..faf91de 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-349c0647b4be565148d3e77d1f80469abddd8efc
+e6cc7ddaaf0f4966b6c691e38b41502d5312f9e4